Improvement in wood pavement



" erto been; and

the courses.` O represents pieces of .-wood, which are mad-e to it` `the double dovetail spaces, as seen in the drawing.

nena @eine y @patent @1mm HENRY new,so'N, or` SPRINGFIELD, AinLiNoIs.

4Letters Patent No. 105,658, dated July 26, 14870.

rMPRovEMENT In Woon PAVEMENT.

` y The Schedule referred to in these Letters Patent and making of the same.

Toallachpm ritmici] concerne BeitknownthatI, HENRY DOWSON, of Spring- `ielilgdmthefcounty'of` Sangamorr and State 'of lllinois, vhaveinvented a new and useful Improvement in Wood` Pavelnents;ai1d `I do hereby declare that' the following'is affull,l clearr and exact descriptionV thereofifwhich will` enable others skilled in the art to `make anduse `the saine, reference being had to the accompanying Adrawing forming part of this specili-A cation.'l Y,

`Thisinventionrelates to anew and useful improvement inwood `street -pavements,"whereby they are made more durable than-such pavements have hithflt consists in so forming the lower portion of the bloekshthat double dovetail spacesare left between the blocks, which spaces double dovetail strips or pieces areinserted, as will be hereinafter morefully described.'l i

Inthe accompanying drawing- Figuren-1 is a topf view of a section of wood pavevment constructed according'to my invention.v

Figure 2 isa vertical section of the pavement on the line ofthe roadway. y Y

`Similar letters of reference indicate corresponding parts." i y l A i A represents the blocks .which form the roadway,

vlaid in tiers or courses across the road, in the ordinary manner, with spaces B between the courses, which are filled with gravel or concrete, as usual. The sides bfI the blocks are out vasseen in iig. 2.' VLach side is doublevbeveled, so that, when they are placed as seen in the drawing, double dovetail spaces are left between lwith the piece C, formsa continuous'arch from. gutteri i Theblocks .and the pieces O rest on the lordinary board oor D olf the pavcnienaif desired; but yas the blocks are, by lthis arrangement firmly bound together,

vno one block being allowed to settlef'below the rest,

the pavement may restv directly on theroad-bcd, with' ont any flooring-beneath. Each courseoi blocks,'=

togntteln l vf By the lowerldove'tal the blocks will becrowded together, should the angles4 cof' the pieces O'be splint-A o" by the pressurefon the blocks. The lower portions f ofv the blocks will then act as wedges, so-that the inclined shonld'ersg of the `blocks are not'depended `upon to keep the blocks in place-and 'from settling, Y g y but their inclined shoulders will have the same effect to crowd the blocks together as the lower portions j'. By this arrangement a double protection is affordedagainst the settling of the blocks, except as they set tlc together. l

A pavement constructed in 4this manner, it will be observed,.requiresno nails or fastenings ofanyliind.

is used.

Having th'us described my invention, i

I claim as new and desire to secure by Letters Patentv The vblocks A and strps'C, correspondingly inclined upon their side faces, and ,relatively arranged for the purpose specified. l

The abovespecication of' my invention signed by me this' 22d day of April, 1870.

HENRY DOWSON The pavement is self-fastening, and grows iii-mer as it Witnesses:

T. C. MATHER, C. P. Kinn. 

